M4.6 Earthquake 8 km SE of San Marcos, Mexico — January 2, 2026
2026-01-02 15:37:04 UTC (2026-01-02) · approx. 8:37 AM UTC-7 local
Felt by 4 people across nearby locations.
On January 2, 2026 at 15:37 UTC, a magnitude 4.6 shallow crustal earthquake struck 8 km SE of San Marcos, Mexico, at a depth of 10.0 km and coordinates 16.7519°, -99.3249°. This earthquake was detected by 57 seismic stations with moderate location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Mexico, a region characterized by the Middle America Trench, where the Cocos Plate subducts beneath the North American Plate. The nearest mapped fault system is the Middle America Trench. View all earthquakes in Mexico.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-99.3249°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake near San Marcos, Mexico?
The magnitude 4.6 earthquake that struck 8 km SE of San Marcos, Mexico on January 2, 2026 at 15:37 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 16.7519°, -99.3249°, which is 8 km SE of San Marcos, Mexico. View all earthquakes in Mexico.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Has Mexico had earthquakes this big before?
The largest recorded earthquake in Mexico was the M8.1 Chiapas earthquake of September 8, 2017. Today's magnitude 4.6 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us7000rm3u). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, January 2, 2026). M4.6 Earthquake 8 km SE of San Marcos, Mexico — January 2, 2026. Retrieved May 14, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000rm3u/